I just had to change the coolant in my Ford truck and decided to use the "required" extended life spec stuff which is Xerex G-05 (http://www.valvoline.com/pdf/zerex_g05.pdf). Take a look at that as well as the rest of the Valvoline antifreeze products - they have decent write up and MSDS on all of their line. Have to say even at NAPA, the net price was not cheap - ~$20/gallon for the concentrate and I needed four (actually 3-1/2) for 50-50